The following are terms of a legal agreement between you and NSA. By accessing, browsing, or using this website, you acknowledge that you have read, understood, and agree to be bound by these terms and to comply with all applicable laws and regulations.

Disclaimer of Warranty

Use of this site is at your sole risk. All materials, information, products, software, programs, and services are provided "as is," with no warranties or guarantees whatsoever. NSA expressly disclaims to the fullest extent permitted by law all express, implied, statutory, and other warranties, guarantees, or representations, including, without limitation, the warranties of merchantability, fitness for a particular purpose, and non-infringement of proprietary and intellectual property rights. Without limitation, NSA makes no warranty or guarantee that this website will be uninterrupted, timely, secure, or error-free.

You understand and agree that if you download or otherwise obtain materials, information, products, software, programs, or services, you do so at your own discretion and risk and that you will be solely responsible for any damages that may result, including loss of data or damage to your computer system.

Limitation of Liability

In no event will NSA be liable to any party for any direct, indirect, incidental, special, exemplary or consequential damages of any type whatsoever related to or arising from this web site or any use of this web site, or of any site or resource linked to, references, or accessed through this web site, or for the use or downloading of, or access to, any materials, information, products, or services, including, without limitation, loss of goodwill, any lost profits, business interruption, lost savings or loss of programs or other data or any other intangible loss, even if NSA is expressly advised of the possibility of such damages. This exclusion and waiver of liability applies to all causes of action, whether based on contract, warranty, tort, or any other legal theories.

Exclusions and Limitations

Some jurisdictions do not allow the exclusion of certain warranties or the limitation or exclusion of liability for certain damages. Accordingly, some of the above disclaimers and limitations of liability may not apply to you. To the extent that NSA may not disclaim any implied warranty or limits its liability, as a matter of applicable law, the scope and duration of such warranty and the extent of NSA's liability shall be the minimum permitted under such applicable law.

Privacy Notice

This site is provided as a public service by the National Security Agency. NSA is committed to protecting your privacy and will collect no personal information about you unless you choose to provide that information to us.

Browsing this site

Some contents of this Web site may be browsed anonymously. The site automatically logs visitor information concerning the pages read, photographs viewed, information downloaded, features activated, and links followed for statistical purposes. This information does not identify you personally. The information gathered helps us to assess the content most interesting to visitors and to determine technical design specifications for identifying system performance issues. The following represents the types of information automatically collected and stored about your visit:

The Internet Domain and Internet Protocol (IP) address from which you access our Web site;

The type of Internet browser and the operating system of the computer you use to access our site;

The date and time you visit our site;

The pages you visit on our site;

If you linked to our Web site from another Web site, the address of that Web site;

And, if you linked to our Web site from a search Web site, the address of the Web site and the search term you used.

Site Security

For site security purposes and to ensure this service remains available to all users, NSA monitors network traffic to identify unauthorized attempts to upload or change information or to otherwise cause damage to the site.

Unauthorized attempts to upload information or change information on this service are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act.

Use of the National Security Agency Seal

In accordance with Section 15 of the NSA Act of 1959, as amended, (50 U.S.C. 402 note) no one may use, without permission from the NSA/CSS the words 'National Security Agency', the initials, or seal of the National Security Agency in connection with any commercial activity or in a manner intended to convey the impression that such use is approved, or authorized by the National Security Agency.

Copyright Notice

Unless a copyright or trademark is indicated, information on the site is in the public domain and may be reproduced, published or otherwise used without the National Security Agency's permission. We request only that the National Security Agency be cited as the source of information and that any photo credits or bylines be similarly credited to the photographer or author or NSA, as appropriate.

The Codebreaker Challenge was developed by the National Security Agency. Check us out at nsa.gov.